The NYC subway system runs on OS/2, IBM’s old PC operating system - https://blog.adafruit.com/2019/06/14/the-nyc-subway-system-runs-on-os-2-ibms-old-pc-operating-system-mta-nyc-vintagecomputing/
The NYC subway system runs on OS/2, IBM’s old PC operating system - https://blog.adafruit.com/2019/06/14/the-nyc-subway-system-runs-on-os-2-ibms-old-pc-operating-system-mta-nyc-vintagecomputing/
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